Office chair



FIG. 1 is a front isometric view of an office chair;

FIG. 2 is a rear isometric view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines in the drawing views are included for purposes ofillustrating environment and form no part of the claimed design.

CLAIM The ornamental design for an office chair, as shown and described.